I have a lot of stuff, and I have worked with all of it at once. In my experience, the effect you get depends not so much on what you have on, at that point, but on which ones are at what strengths.
The answer is anything but cut and dried because that means you can get all or any possible responses depending on how you mix. I have trued a mix called “10E”, standing for “10 mcg of everything” and it’s like mixing all the colors of the rainbow together - results not good at that level because of such wonderful inclusions as P-75, which should be worn at around 2 mcg or less at a time. But without P-75 overdosing, let’s say I was to wear 10E but only 2 mcg of P-75, the effects are pretty good.
Overall, it’s like having a very specific color that is so subtle that it has no name… not quite magenta, or pink, or purple, but… something. The more pheromones I use at once, the more subtle the effects become because it’s like a symphony playing, not just a Sax, or a Sax, a guitar and drums. Thus, symphonic mix.